Wheelset bearing for the wheelset of a rail vehicle having an internally mounted truck

Abstract

A wheelset bearing for the wheelset of a rail vehicle having an internally mounted truck that includes one bearing housing per side of the wheelset that encloses the wheelset bearing for the wheelset, where the wheelset bearing and bearing housing are within the wheels in an installed state and a torsion spring serves as a roll stabilizer that is connected to the bearing housing such that the torsion springs are rigidly connected to one bearing housing each on the two ends thereof (without interconnection of draw-pressure rods) so as to implement roll stabilization for the wheelsets in a manner that is as technically simple as possible.

Claims

1. A wheelset bearing for a wheelset of a rail vehicle having an inside bearing truck, comprising one bearing housing per side of the wheelset, each bearing housing enclosing a wheelset bearing for the wheelset, and the wheelset bearing and bearing housing being located inside the wheels in an installed state; and a torsion spring comprising a roll stabilizer, said torsion spring being connected transversely to the bearing housings; wherein the torsion spring is rigidly connected to one bearing housing at each of its two ends without tie/push rods being connected therebetween.

2. The wheelset bearing as claimed in claim 1, wherein a middle section of the torsion spring is arranged spaced at a distance from and parallel to a wheel axis.

3. The wheelset bearing as claimed in claim 2, wherein at least the middle section of the torsion spring serves as a carrier for at least one brake actuator.

4. The wheelset bearing as claimed in claim 3, wherein the at least one brake actuators is a caliper brake.

5. The wheelset bearing as claimed in claim 3, further comprising: a wheelset; wherein at least one brake disk is mounted on an axle of the wheelset.

6. The wheelset bearing as claimed in claim 2, wherein the torsion spring is fabricated in one piece and is directly connected to one bearing housing in each case.

7. The wheelset bearing as claimed in claim 2, further comprising: levers fixedly joined to the torsion spring at each of the two ends of the torsion spring and including an angle with the longitudinal direction of the torsion spring.

8. The wheelset bearing as claimed in claim 2, wherein at least the middle section of the torsion spring is rod-shaped.

9. The wheelset bearing as claimed in claim 1, wherein the torsion spring is fabricated in one piece and is directly connected to one bearing housing in each case.

10. The wheelset bearing as claimed in claim 9, wherein that the two ends of the torsion spring are formed bent relative to the middle section of the torsion spring.

11. The wheelset bearing as claimed in claim 1, further comprising: levers fixedly joined to the torsion spring at each of the two ends of the torsion spring and including an angle with the longitudinal direction of the torsion spring.

12. The wheelset bearing as claimed in claim 1, characterized in that the torsion spring is fabricated from spring steel.

13. The wheelset bearing as claimed in claim 1, further comprising: a wheelset; and an inside bearing truck; wherein the bearing housing is connected in an articulated manner to a truck frame by way of a wheelset guide bushing, while no direct connection exists between the truck frame and torsion spring.

14. The wheelset bearing having a wheelset and having an inside bearing truck as claimed in claim 13, wherein at least a middle part of the torsion spring is arranged parallel to a wheel axis in proximity to a connecting line between two wheelset guide bushings.

15. The wheelset bearing having a wheelset and having an inside bearing truck as claimed in claim 14, wherein a bearing for realizing the connection to the frame of the truck is provided in each wheelset guide bushing, axis of rotation of the bearing including an angle with the middle section of the torsion spring.

16. The wheelset bearing having a wheelset and having an inside bearing truck as claimed in claim 14 and also having a wheelset drive, wherein at least a middle section of the torsion spring forms part of a torque support for the wheelset drive.

17. The wheelset bearing having a wheelset and having an inside bearing truck as claimed in claim 13, wherein a bearing for realizing the connection to the frame of the truck is provided in each wheelset guide bushing, axis of rotation of the bearing including an angle with the middle section of the torsion spring.

18. The wheelset bearing having a wheelset and having an inside bearing truck as claimed in claim 13 and also having a wheelset drive, wherein at least a middle section of the torsion spring forms part of a torque support for the wheelset drive.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the interests of further explanation of the invention, reference is made in the following part of the description to the figures, from which further advantageous embodiments, details and developments of the invention may be derived, in which:

(2) FIG. 1 shows a truck having two wheelset bearings in accordance with the invention in a perspective view;

(3) FIG. 2 shows a wheelset bearing of FIG. 1 in a perspective view, seen from below;

(4) FIG. 3 shows a plan view onto an alternative wheelset bearing having brake actuators in a perspective view, seen from above;

(5) FIG. 4 shows a wheelset bearing of FIG. 1 in a perspective view, seen from below, having bearings inclined at an angle for the connection to the truck frame; and

(6) FIG. 5 shows a side view of a wheelset bearing of FIG. 4.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

(7) FIG. 1 depicts a truck frame 8 having two wheelset bearings in accordance with the invention, the front right-hand wheel 3 being shown detached to reveal the bearing housing 7 and the primary suspension, consisting of spring 5 and optionally in addition of a damper 6 (instead of the damper 6 it would of course also be possible to use self-damping springs 5). For illustrative purposes, the wheelset guide principle of the motion link has been chosen by way of example. The bearing housing 7 has an arm that carries spring 5 and damper 6, as well as, on the opposite side, a further arm having at its end a wheelset guide bushing 4 by which the wheelset is pivot-mounted in the truck frame 8. In this instance, the wheelset axle 2 has four brake disks 9 arranged in two pairs. The associated brake actuators 10 are mounted on the truck frame 8. The wheelset bearing, which encloses the wheelset axle at its ends and is mounted in the bearing housing 7, is not visible here. The two bearing housings 7 are connected to the torsion spring 1.

(8) FIG. 2 shows only the wheelset, consisting of two wheels 3 and the wheelset axle 2 connecting these, and the two bearing housings 7 from FIG. 1. The wheelset axle 2 is mounted in the wheelset bearings 11. The torsion spring 1 is attached on the underside of the arm, where the wheelset guide bushing 4 that is press-fitted into the bearing housing 11 is provided. In this case, the torsion spring 1 is form in a rod-shaped with a round cross-section, the two ends being bent round through approximately 90° so that the ends coincide with the two arms of the bearing housing 7. In this arrangement, the ends are fixedly connected to the bearing housing 7. The middle section of the torsion spring 1 lies parallel and in proximity to the connection between the two wheelset guide bushings 4 and in a plane normal to the direction of travel.

(9) FIG. 3 shows an alternative embodiment of a torsion spring 12 that is formed as straight and is connected directly to the bearing housing 7. The torsion spring 12 is wider than it is high, viewed in the direction of travel, and has caliper brakes 10 on its top side that cooperate with the associated pairs of brake disks 9. No further torsion spring, as for instance in the form of the torsion spring 1 from FIGS. 1 and 2, is provided.

(10) In this case, the torsion spring 12 lies roughly in a horizontal plane with the wheelset axle 2. Viewed in the direction of travel, the torsion spring lies largely inside the wheelset guide bushings 4.

(11) As shown in FIGS. 4 and 5, a bearing 13 is provided in each of the two wheelset guide bushings 4 for realizing the connection to the frame 8 (see FIG. 1) of the truck. The axes of rotation 14 of the bearing 13 include an angle with the longitudinal axis of the middle section of the torsion spring 1; they are inclined downward with respect thereto (or, as the case may be, to the horizontal) inside the bearing housing 7. The angles are of equal magnitude for the two bearings 13 of the same wheelset and are symmetrical to the longitudinal median plane of the frame 8 of the truck. The angle typically amounts to a few degrees and can lie approximately in the range up to 20°.

(12) The bearings 13 can be formed as journal or link bearings. The bearing 13 enables the wheelset guide bushing 4 (and hence the bearing housing 7) to rotate about the axis of rotation 14 of the bearing 13. Engaging with the bearing 13 is, for example, a motion link which is part of the frame of the truck 8 and which consequently is rigidly connected at its other end to the frame 8 of the truck.

(13) Thus, while there have been shown, described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.